The rtai-24.1.9.tgz README.INSTALL

[Steve Polishinski]

Nick,
	When I first tried to get RTAI running, it turned out that my mother
board was not compatible.  Nearly all the examples locked up for me,
too.  One that did run, and indeed pointed the way to the solution, was
the "buslokchk" test.  I recommend you also attempt to run that and see
what happens.  I would not, however, expect that your mother board is
the problem, as it is running the SiS chipset, and so far that chipset
has been OK.  Review the RTAI email history (rtai.mbox file) to get the
full story of my issues getting RTAI.  Fortunately, RTAI DOES work, so
don't give up. (Go team, go.)

	One issue with RTAI '.9 is that CPU's with frequency greater than ~2.1
Ghz are NOT supported. (You reported 2.26Ghz)   There's a 32 bit signed
math issue, since >=2.147483648 Ghz sets bit 31 to "negative."  RTAI's
requisite determination of CPU frequency then blows up, causing many
things to die. I bought a slower CPU (2.0Ghz), and another mother
board.  Then later upgraded to 24.1.10, which supports upto 4.4 Ghz
CPUs, so I could run @ 2.2 Ghz.  Again, review the rtai.mbox file - grep
for my last name, that should be unique enough.  Sept 30th.

	Hope this helps, let us know.

	Thanks, Steve



Nick Torenvliet wrote:
> 
> Okay so far so good,
> 
> I've compile the rthal enabled kernel, and built the rtai modules, as
> per the readme.install.
> 
> The system boots up fine and I can insmod rtai, rtai_sched and
> rtai_fifos in succession and
> then rmmod them without difficulty.
> 
> My machine freezes up whenever I try to run one of the examples though.
> 
> To be specific I tried the edf example.  It looks like it loads
> rtai,rtai_sched and then ex_edf.
> When I use the run ./run, the system freezes, and when I try to load the
> modules manually
> the system freezes right after insmoding ex_edf.  Similar things happen
> with the other examples
> that I have tried.
> 
> I am using the kgcc that comes with redhat7.3 . I have tried recompiling
> the examples files and
> running them but to no avail.
> 
> I am not sure how to get the examples running.